CN203748095U - Low temperature plasma generator power supply for critical spark control - Google Patents
Low temperature plasma generator power supply for critical spark control Download PDFInfo
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- CN203748095U CN203748095U CN201420102451.1U CN201420102451U CN203748095U CN 203748095 U CN203748095 U CN 203748095U CN 201420102451 U CN201420102451 U CN 201420102451U CN 203748095 U CN203748095 U CN 203748095U
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Abstract
The utility model discloses a low temperature plasma generator power supply for critical spark control. The power supply is composed of a main circuit and a measurement control circuit; the main circuit comprises a single phase bridge fully-controlled rectifying and filter circuit, a DC / AC high frequency inverter circuit, an LC filter circuit, and a high frequency step-up circuit which are sequentially connected in series; and the measurement control circuit consists of an isolating drive circuit and an SPWM voltage-voltage composite controller. In the power supply, the measurement control circuit closes a loop to control the plasma generator main circuit to output an electric field; according to the electrical physical characteristics of a critical spark state, a voltage amplitude and pulse width between the cathode and anode of the plasma generator can be adjusted in a dynamic manner, so that the power supply reaches the critical spark state; and the plasma concentration can reach and maintain the maximum. In the power supply, the SPWM technology is applied to the plasma high-voltage power supply control, is simple in principle and good in control and adjustment performance, and has the characteristics of being capable of eliminating the harmonic wave, adjusting and stabilizing the output voltage, adjusting the output voltage amplitude and frequency continuously in the dynamic manner, and etc.
Description
Technical field
The utility model relates to a kind of high voltage inverting power source, specifically a kind of low-temperature plasma generator power supply of critical spark control.
Background technology
The purification method of the room air pollution adopting at present has ventilation formula, filtering type, absorption type etc., but can process contaminant particle size, treatment effeciency, processing toxic gas (NOx, SOx, VOCs etc.) and the aspect such as sterilization, conventional method cannot meet the demands.The seventies and eighties in 20th century rises, plasma starts flourish in the application study of the numerous areas such as low temperature sterilization and pollution control, form the research direction to multidisciplinary intersection, the means that produce low temperature plasma are a lot, the methods such as available electric field excitation, ultra-violet radiation, X ray, heating.Whether high-frequency plasma no matter have dielectric impedance, nearly all can maintain continuous, uniformly, effectively electric discharge.
So-called critical spark state is that the medium voltage between positive and negative electrode is elevated to the state that will produce discharge spark but also do not produce discharge spark under certain open voltage effect.What the utility model related to is a kind of low-temperature plasma generator power supply of the critical spark control based on high-frequency corona discharge plasma.
In the time utilizing low-temperature plasma air purification sterilization, body flue gas desulphurization and sewage disposal, according to the mechanism of action, must meet following two primary conditions:
(1) energy that impulse electric field will make electronics obtain in free travel is enough to activating reaction thing effectively, produces all kinds of living radical group, promotes S0
2or organic dissociating in water;
(2) extra electric field also will be controlled the time that electronics is applied to energy within the specific limits, between ensureing at this moment, in section, electronics obtains very high energy, other ion is in firm starting state, the energy obtaining is very low, the energy that the external world provides stops, thereby under normal temperature and pressure state, suppress the temperature rise of gas or liquid, improve capacity usage ratio.
As can be seen here, the only resource that produces this kind of electric discharge is the precipitous narrow pulsewidth high-voltage pulse power supply in forward position that utilizes Pulse Power Techniques to produce, and excites high energy electron.
Current aspect pollution emission control, the total energy consumption of REPETITIVE PULSED POWER TECHNOLOGY and system is the Main Bottleneck of pulse power corona plasma commercial Application.Impulse power electrical source is the key that realizes Pulse Power Techniques, relate to the analysis of pulse power generation systems, pulse steepness and modulating system, pulse power system and load matched, the biology of Fast pulsed discharge, medical effect, high repetition frequency, long-life switch, high energy storage density, small size, long discharge life-span noninductive capacitor, the content of the every aspects such as high-efficiency pulse transformer.Its performance and electrical quantity (amplitude of pulse, width, forward position, repetition rate) directly determine plasmoid (electron temperature, ion temperature and density distribution etc.), the productive rate of active particle and the energy utilization efficiency of whole system in reactor, finally affect impulse electric corona plasma treatment effect.
The general high voltage pulse power is all to adopt DC high-voltage power supply to capacitor charging, then through pulse shaping loop, by the scheme of high pressure trigger switch trigger impulse.Wherein trigger switch has rotation spark, self breakdown spark gap switch and magnetic switch etc.
Existing several pulse power scheme and defect:
1) pulse transformer formula current technique: comparatively ripe, but because having adopted transformer fe core material to limit the steepness of pulse front edge;
2) air-core transformer formula power supply: can obtain zooming pulse, but be subject to heavy current pulse to form the restriction of switch (as spark gap, counterfeit fiery switch and corona stabilization switch etc.), its useful life is short;
3) transmission line pulse power supply: output characteristic is bad.
Utility model content
The purpose of this utility model is to provide a kind of low-temperature plasma generator power supply of critical spark control, the particular/special requirement of this power pin plasma high voltage source, adopt critical spark control theory profit, make power supply and plasma generator Auto-matching, the precipitous narrow pulsewidth high-voltage pulse power supply in forward position producing with Pulse Power Techniques, excite high energy electron, SPWM pulse modulation technology is used for to this power supply control, can harmonic carcellation thereby realize, regulate and regulated output voltage, so that plasma generator reaches optimum state.When plasma generator can produce ultra-high-frequency wave in circuit during in the flower-shaped state of critical work, when detecting this feature, measuring circuit thinks that critical spark state is controlled and maintains.
For achieving the above object, the utility model provides following technical scheme:
A low-temperature plasma generator power supply for critical spark control, is serially connected between 220V civil power and low-temperature plasma generator pole plate, and this power supply is made up of main circuit and circuit of measurement and control; Described main circuit is made up of single-phase bridge full-controlled rectifier filter circuit, DC/AC high-frequency inverter circuit, LC filter circuit and the high frequency booster circuit of connecting successively; Described circuit of measurement and control is made up of isolated drive circuit and SPWM voltage-voltage composite controller; Described SPWM voltage-voltage composite controller is in parallel with DC/AC high-frequency inverter circuit, and SPWM voltage-voltage composite controller also connects DC/AC high-frequency inverter circuit by isolated drive circuit.
As further program of the utility model: described SPWM voltage-voltage composite controller is made up of DC voltage testing circuit, integrated SPWM chip, AC measuring voltage and change-over circuit, variable-gain amplifying circuit, pi regulator, voltage setter, sine-wave generator and normalizing scale unit, described DC voltage testing circuit one end is connected between single-phase bridge full-controlled rectifier filter circuit and DC/AC high-frequency inverter circuit, the DC voltage testing circuit other end connects normalizing scale unit, described AC measuring voltage and change-over circuit one end are connected between DC/AC high-frequency inverter circuit and LC filter circuit, described AC measuring voltage and the change-over circuit other end and voltage setter, and the normalizing scale unit other end connects pi regulator simultaneously, described pi regulator also connects respectively sine-wave generator and variable-gain amplifying circuit, described variable-gain amplifying circuit connects integrated SPWM chip, described integrated SPWM chip connects DC/AC high-frequency inverter circuit by isolated drive circuit.
In the utility model, single-phase bridge full-controlled rectifier filter circuit adopts full-wave rectification, load on two half-waves and have that electric current is little during than half-wave by, output voltage degree of pulsatility, transformer utilization factor is high and do not have DC magnetization problem, its output average voltage is 1.2 times of half-wave rectifying circuits, the average current that flows through thyristor under identical load reduces 1/3rd, and power factor has improved half.
The utility model power supply is a kind of power supply that produces high-frequency and high-voltage, thereby uses capacitor filtering, in the DC/AC of SPWM high-frequency inverter circuit, adopt the integrated SPWM chip of voltage-type to form SPWM voltage-voltage composite controller, utilize the triangular wave that integrated SPWM chip internal produces to compare and obtain SPWM waveform with the sinusoidal modulation wave of being inputted by outside, because the amplitude of triangular wave is now to regulate, so the sampled value of feed-forward voltage is normalized after conversion according to input/output relation UO1=KUIVc/ Vr of circuit, with feedback voltage, given voltage comprehensively compares, after pi regulator regulates, be connected to variable-gain amplifying circuit and go to regulate sinusoidal wave amplitude, thereby realize electric voltage feed forward and Voltage Feedback control, realize double-voltage control by integrated component.
Compared with prior art, the beneficial effects of the utility model are:
1. the utility model is on the basis of Single-phase SPWM inversion, and the voltage-voltage compound control scheme that adopts feedforward adjustment triangular carrier and feedback adjusting sine wave to combine, has solved output voltage transient state skew problem preferably, and realizes simple.
2. the utility model can have been realized the reliable tracking to load frequency and the reliable control to inverter mode, makes the critical spark state between anode and cathode reach best to obtain the adjustable high frequency voltage of frequency.Critical spark be between plasma generator the two poles of the earth by static state to dynamic a kind of critical condition, this state has its special physical features.According to this feature, it is controlled and makes plasma generator reach optimum state.
3. the utility model is by SPWM technology for the control of plasma high voltage source, have that principle is simple, control and adjusting function good, there is harmonic carcellation, adjusting and regulated output voltage, output voltage is adjustable, the frequency various features such as adjustable continuously.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of low-temperature plasma generator power supply of critical spark control;
Fig. 2 is the theory diagram of SPWM voltage-voltage composite controller in the utility model;
In above-mentioned figure: 1-220V civil power; 2-main circuit; 3-circuit of measurement and control; 4-single-phase bridge full-controlled rectifier filter circuit; 5-DC/AC high-frequency inverter circuit; 6-LC filter circuit; 7-high frequency booster circuit; 8-SPWM voltage-voltage composite controller; 9-isolated drive circuit; 10-DC voltage testing circuit; 11-integrated SPWM chip; 12-AC measuring voltage and change-over circuit; 13-variable-gain amplifying circuit; 14-pi regulator; 15-voltage setter; 16-sine-wave generator; 17-normalizing scale unit; 18-low-temperature plasma generator pole plate.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of low-temperature plasma generator power supply of critical spark control, is serially connected between 220V civil power 1 and low-temperature plasma generator pole plate 18, and this power supply is made up of main circuit and circuit of measurement and control; Described main circuit 2 is made up of single-phase bridge full-controlled rectifier filter circuit 4, DC/AC high-frequency inverter circuit 5, LC filter circuit 6 and the high frequency booster circuit 7 of connecting successively; Described circuit of measurement and control 3 is made up of isolated drive circuit 9 and SPWM voltage-voltage composite controller 8; Described SPWM voltage-voltage composite controller 8 is in parallel with DC/AC high-frequency inverter circuit 5, and SPWM voltage-voltage composite controller 8 also connects DC/AC high-frequency inverter circuit 5 by isolated drive circuit 9.
Refer to Fig. 2, described SPWM voltage-voltage composite controller 8 is made up of DC voltage testing circuit 10, integrated SPWM chip 11, AC measuring voltage and change-over circuit 12, variable-gain amplifying circuit 13, pi regulator 14, voltage setter 15, sine-wave generator 16 and normalizing scale unit 17, described DC voltage testing circuit 10 one end are connected between single-phase bridge full-controlled rectifier filter circuit 4 and DC/AC high-frequency inverter circuit 5, DC voltage testing circuit 10 other ends connect normalizing scale unit 17, described AC measuring voltage and change-over circuit 12 one end are connected between DC/AC high-frequency inverter circuit 5 and LC filter circuit 6, described AC measuring voltage and change-over circuit 12 other ends and voltage setter 15, and normalizing scale unit 17 other ends connect pi regulator 14 simultaneously, described pi regulator 14 also connects respectively sine-wave generator 16 and variable-gain amplifying circuit 13, described variable-gain amplifying circuit 13 connects integrated SPWM chip 11, described integrated SPWM chip 11 connects DC/AC high-frequency inverter circuit 5 by isolated drive circuit 9.
The course of work of the present utility model is as follows:
220V civil power 1 this power supply input side of access, change the adjustable direct current of voltage into through single-phase bridge full-controlled rectifier filter circuit 4, this direct current is input to the DC/AC high-frequency inverter circuit 5 of being controlled by SPWM voltage-voltage composite controller 8, and the DC/AC high-frequency inverter circuit 5 of controlling through SPWM voltage-voltage composite controller 8 is transformed into the alternating current that load needs.
For DC/AC high-frequency inverter circuit 5, adopt SPWM voltage-voltage composite controller 8 to control, utilize the inner triangular wave producing of integrated SPWM chip 11 to compare and obtain SPWM waveform with the sinusoidal modulation wave of being inputted by sine-wave generator 16, because the amplitude of triangular wave is now to regulate, so the sampled value of feed-forward voltage is normalized after conversion by normalizing scale unit 17 according to input/output relation UO1=KUIVc/ Vr of circuit, with the feedback voltage obtaining via DC voltage testing circuit 10 corresponding to DC/AC high-frequency inverter circuit 5 input and output side two ends and AC measuring voltage and change-over circuit 12, and the given voltage of voltage setter 15 comprehensively compares, after pi regulator 14, be connected to variable-gain amplifying circuit 13 and go to regulate sinusoidal wave amplitude, thereby realize electric voltage feed forward and Voltage Feedback control, realize double-voltage control by integrated component, described integrated SPWM chip 11 is controlled the output of DC/AC high-frequency inverter circuit 5 via isolated drive circuit 9, then passes through LC filter circuit 6 and high frequency booster circuit 7, finally outputs to low-temperature plasma generator pole plate 18 two ends.
Normal operation, when a spark previous moment appears putting in low-temperature plasma generator pole plate 18, in system, just having irregular high frequency voltage produces, in the time that circuit of measurement and control 3 detects this high frequency voltage, adjust the output valve of main circuit 2, to ensure that low-temperature plasma generator pole plate 18 electric fields are all the time in critical spark state.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the utility model.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other execution modes that it will be appreciated by those skilled in the art that.
Claims (2)
1. a low-temperature plasma generator power supply for critical spark control, is serially connected between 220V civil power (1) and low-temperature plasma generator pole plate (18), it is characterized in that, this power supply is made up of main circuit and circuit of measurement and control; Described main circuit (2) is made up of the single-phase bridge full-controlled rectifier filter circuit (4) of connecting successively, DC/AC high-frequency inverter circuit (5), LC filter circuit (6) and high frequency booster circuit (7); Described circuit of measurement and control (3) is made up of isolated drive circuit (9) and SPWM voltage-voltage composite controller (8); Described SPWM voltage-voltage composite controller (8) is in parallel with DC/AC high-frequency inverter circuit (5), and SPWM voltage-voltage composite controller (8) also connects DC/AC high-frequency inverter circuit (5) by isolated drive circuit (9).
2. the low-temperature plasma generator power supply of critical spark control according to claim 1, it is characterized in that, described SPWM voltage-voltage composite controller (8) is made up of DC voltage testing circuit (10), integrated SPWM chip (11), AC measuring voltage and change-over circuit (12), variable-gain amplifying circuit (13), pi regulator (14), voltage setter (15), sine-wave generator (16) and normalizing scale unit (17), described DC voltage testing circuit (10) one end is connected between single-phase bridge full-controlled rectifier filter circuit (4) and DC/AC high-frequency inverter circuit (5), DC voltage testing circuit (10) other end connects normalizing scale unit (17), described AC measuring voltage and change-over circuit (12) one end are connected between DC/AC high-frequency inverter circuit (5) and LC filter circuit (6), described AC measuring voltage and change-over circuit (12) other end and voltage setter (15), and normalizing scale unit (17) other end connects pi regulator (14) simultaneously, described pi regulator (14) also connects respectively sine-wave generator (16) and variable-gain amplifying circuit (13), described variable-gain amplifying circuit (13) connects integrated SPWM chip (11), described integrated SPWM chip (11) connects DC/AC high-frequency inverter circuit (5) by isolated drive circuit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102451.1U CN203748095U (en) | 2014-03-07 | 2014-03-07 | Low temperature plasma generator power supply for critical spark control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102451.1U CN203748095U (en) | 2014-03-07 | 2014-03-07 | Low temperature plasma generator power supply for critical spark control |
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| CN203748095U true CN203748095U (en) | 2014-07-30 |
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| CN201420102451.1U Expired - Fee Related CN203748095U (en) | 2014-03-07 | 2014-03-07 | Low temperature plasma generator power supply for critical spark control |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449535A (en) * | 2015-12-24 | 2016-03-30 | 韩汶冀 | High-energy ionic field generation device and ionic field generation method |
| CN106422704A (en) * | 2016-11-04 | 2017-02-22 | 浙江大学 | Integrated system for deeply removing various pollutants |
| CN106647490A (en) * | 2016-12-19 | 2017-05-10 | 台州伟博环保设备科技有限公司 | Plasma generator power supply control system |
| CN107425735A (en) * | 2017-07-31 | 2017-12-01 | 山东山大华天科技集团股份有限公司 | A kind of efficiently tolerance may be programmed inverter power supply device and its control method |
-
2014
- 2014-03-07 CN CN201420102451.1U patent/CN203748095U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449535A (en) * | 2015-12-24 | 2016-03-30 | 韩汶冀 | High-energy ionic field generation device and ionic field generation method |
| CN105449535B (en) * | 2015-12-24 | 2016-09-21 | 韩汶冀 | Energetic ion field generating means and ion field method for generation |
| CN106422704A (en) * | 2016-11-04 | 2017-02-22 | 浙江大学 | Integrated system for deeply removing various pollutants |
| CN106647490A (en) * | 2016-12-19 | 2017-05-10 | 台州伟博环保设备科技有限公司 | Plasma generator power supply control system |
| CN107425735A (en) * | 2017-07-31 | 2017-12-01 | 山东山大华天科技集团股份有限公司 | A kind of efficiently tolerance may be programmed inverter power supply device and its control method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20170307 |